Perfectionnements apportés aux surfaces utilisées pour la reproduction des sons,申请号FRD732297-传众专利搜索

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发明名称	Perfectionnements apportés aux surfaces utilisées pour la reproduction des sons
摘要
申请公布号	FR732297(A)	申请公布日期	1932.09.15
申请号	FRD732297	申请日期	1931.05.06
申请人	SOCIETE DES USINES CHIMIQUES RHONE-POULENC	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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